Tanqingwu -- Importance of Security and Stability of Electric Power Storage System

Many industry insiders believe that 2018 is the first year of the outbreak of energy storage.

In particular, in the context of the imminent problem of power battery subsidy continued to retreat from Hedongli battery decommissioning and recycling, energy storage is also considered by battery companies to be the next wind. According to the survey of the supply chain tour of Gaogong Li-Power in 2018, energy storage has become the key layout and breakthrough market for major battery companies in 2018.

Specifically, the three domestic markets of communication reserve energy storage, power storage, and data center storage are the main target areas of battery companies at present. Among them, the power storage energy market is relatively large and the growth potential is promising. It is currently a battleground for many lithium battery companies and energy storage system providers.

On May 21st, the 11th High-tech Lithium Power Industry Summit was held at the Shenzhen Four Seasons Hotel, and 300 + subdivided heavyweight enterprises 700 + senior executives participated. Tanqingwu, project director of the energy storage division of Zhongtian Storage Technology Co., Ltd.(hereinafter referred to as "Zhongtian Storage Energy"), delivered a keynote speech on the importance of the security and stability of power storage systems.

Mr Tanqingwu said system security and stability had always been the first element of the company's product services. First of all, he introduced the system safety design mainly involves safety design(mainly including fire safety, electrical safety, relay protection, battery safety, strategic safety, electrical access, monitoring access, etc.), access design, operation strategy, thermal design, equipment layout, system protection 6 big version.

The security and stability design of Zhongtian Energy Storage is: Starting from the five major aspects of system security, electrical safety, software strategy security design, system thermal design, and operation monitoring design. Through the innovative BMS system architecture, the system's DC side operation safety, and the establishment of EMS system remote monitoring, a safe house has been built for the entire energy storage system.

Safety and security of the system: Heptafluoropropane gas fire extinguishers are used in the Zhongtian Energy Storage System container, and smoke and temperature are provided in each cabin; The fire signal is sent to the automatic fire extinguishing controller installed in the electrical room for monitoring. At the same time, the container battery room matches the fire pressure relief valve, which is used in the cabin pressure during the fire extinguisher action to ensure that the internal pressure during the fire extinguishing process is safe and stable.

Electrical safety aspect: the equipment in the Zhongtian energy storage container is grounded through the copper row, and the latter is connected to the underground ground network to achieve the protective grounding and lightning protection grounding functions. The system is designed and grounded according to GB14050-2008 "System Grounding Type and Safety Technical Requirements" and GB50057-2010 "Building Mine Protection Design Code".

Tanqingwu said: "The company's self-developed high-pressure control box uses a Pre-Charged circuit to test the system before it goes on power, ensuring the safety of DC high voltage power. At the same time, we use relay control at both the positive and negative poles to ensure that when the system fails, the relay is broken by pressing the emergency stop button, and the high-pressure loop is disconnected in time to protect the system's safety. "

Software strategy security design aspect: Zhongtian storage can have strict system safe operation logic control, ensure the system stable and reliable operation; The communication signals of related equipment in the system(battery management system, energy storage bidirectional converter, energy management system, power switch device, air conditioning fan, fire signal) can all achieve safety interlocking, ensuring that the system is absolutely reliable.

In terms of system thermal design, the mid-sky storage can use the thermal design of the thermal simulation auxiliary cell box and battery room to ensure that the temperature rise during the battery charging and discharging process is less than 10 °C, and the temperature difference in the entire battery room is within 10 °C. In order to achieve the conversion and life of the system in the optimal ambient temperature range to ensure that the service life of the system reaches expectations.

Operation monitoring design: Zhongtian Science and Technology Energy Management System has three functions: local monitoring, cloud remote monitoring, and grid monitoring. Local monitoring can realize system state display, storage, upload and system emergency stop control; The data acquisition and tabulation of the remote monitoring system in the cloud can be used to issue control instructions to the system, but the implementation of the instructions needs to be confirmed by two levels of approval; The operation data of the power grid monitoring and realization system is uploaded to the energy management platform of Jiangsu Province and can accept the dispatching instructions of the power grid.

The page contains the contents of the machine translation.